261976256 has 168 divisors, whose sum is σ = 627095520. Its totient is φ = 107864064.

The previous prime is 261976249. The next prime is 261976271. The reversal of 261976256 is 652679162.

261976256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (272160) is a multiple of the sum of its prime divisors (90).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9033650 + ... + 9033678.

Almost surely, 2^261976256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261976256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313547760).

261976256 is an abundant number, since it is smaller than the sum of its proper divisors (365119264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261976256 is a wasteful number, since it uses less digits than its factorization.

261976256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 90 counting only the distinct ones).

The product of its digits is 272160, while the sum is 44.

The square root of 261976256 is about 16185.6805850109. The cubic root of 261976256 is about 639.8634604556.

The spelling of 261976256 in words is "two hundred sixty-one million, nine hundred seventy-six thousand, two hundred fifty-six".